You want to buy a new cell phone that costs $80 and two new video games that cost $40 each, but you don't have enough money saved for all of it. Which of the following best describes the opportunity costs involved in your purchase decision?

If you buy a new cell phone, your opportunity cost is the money you spend to purchase the phone.
If you buy two new games, your opportunity cost is the money you spend to purchase the games.
If you buy a new cell phone, your opportunity cost is the time you could spend talking on the phone.
If you buy two new games, your opportunity cost is the time you could spend talking on the phone.

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d.what is the height of the tide after 93 hours?